Major League Records
Most extra-base hits by a team in one season - 649, Boston Red Sox, 2003
Most total bases by a team in one season - 2832, Boston Red Sox, 2003
Highest slugging percentage for a team in one season - .491, Boston Red Sox, 2003
Most players with 30 or more doubles - 8, Boston Red Sox, 2003
Most players with 80 or more RBI (tie) - 8, Boston Red Sox, 2003
Most players with 100 or more hits (tie) - 9, Boston Red Sox, 2003
Most runs scored before the first out of a game - 10, Boston Red Sox, 6/27/2003
Most runs scored in the first inning of a game (tie) - 14, Boston Red Sox, 6/27/2003
Most grand slams in a game (tie) - 2, Bill Mueller*, 7/29/2003
Most hits in an inning (tie) - 3, Johnny Damon**, 6/27/2003

American League Records
Most hits in a game (tie) - 6, Nomar Garciaparra, 6/21/2003

Red Sox Records
Most hits in a game - 28, 6/27/2003
Most doubles in an inning - 5, 6/1/2003
Most singles in a game - 6, Nomar Garciaparra, 6/21/2003
Most home runs in a game (tie) - 3, Bill Mueller, 7/29/2003
Most intentional walks to a right-handed batter in a season - 28, Manny Ramirez
Most men left on base by one player in one game - 12, Trot Nixon, 6/12/2003 (13 inn.)
Most pitchers used in one season - 26
Most home runs in a season - 238
Most home runs hit on the road in a season - 127
Most home runs in one month - 55, July 2003
Most players with 20 or more home runs - 6
Most players with 10 or more home runs - 9
Most sacrifice flies in a season - 64

* Mueller became the first player in Major League history to hit grand slams from both sides of the plate in one game, 7/29/2003.
** Damon became the first player in Major League history to hit a single, a double, and a triple in the same inning, 6/27/2003.